Balloon-envelop material.



J. RUND.

BALLOON ENVELOP MATERIAL.

APPLICATION IILED JULY 5, 1910.

1,001,892. 1 Patented Aug. 29, 1911.

' of the Emperor of Germany, residin To all whom it concern! JULIUS RUND, or rnAirnronr-oN-rHE-Mun, GERMANY.

BALLOON-ENVELOP MATERIAL.

Specification of Letters Patent, 1' Patented Aug. 29, 1911.

Application filed July 5, 1910. Serial No. 570,464.

Be it known that I, JULIUS RUND, subject at Goethestrasse 10, F rankfort-on theain, Germany, have invented a certain new and useful Balloon-Envelop Material, of which the following is a speclfication.

This invention relates to material for the enve'lops of balloons and the like. The properties which such material must possess are particularly great resistance to tearing and impermeability to gases, and other desirablegfeaturesof the material are that it should protect the caoutchouc lining from the'influence of light and the contained gas fromflargetemperature, variations.

It .is understood,of course, thatthe im provements the material should not introduce any unnecessary increase in the weight or costof the same.

materialfor balloon envelope, which Will possess the above mentioned qualities, which inflated-fora longperiod (as in the case of 'a motor" balloon), or one which is inflated for a short period (say an aerostat).

:{The present invention consists substantially inan'xi'rnproved material for the envelops of balloons, having strong threads spaced atintrvale in the Weft and warp and weaved into or on to the material for the purpose-of increasing its resistance to tearing. The tearing resistance of the material can also be increased by a binding of net or gauze fabric of strong threads placed between smooth fabrics. In this case reinforced fabric in combination with smooth .fabrics may be used.

. closed gas, indiarubber has hitherto provided itself particularly useful in rendering the envelop impermeable. On account of its cost, only a thin coating of indiarubber can be employed. According to the present invention of a layer of fibrous material such as paper; felt or the like is used as the gas tight material, and is united to the fabric by an adhesive, preferably chrome glue. A particularly high degree. of gas tightness can be obtained if in addition to the layer of lue and fibrous material a thin coating of indiarubberis provided, for example it may be laid on to the latter layer. In order The object of the present invention is a to prevent the decomposition of the indiarubber by the rays of light, the fibrous layer The drawing illustrates in Figures 1 and- 2 two varieties of material for balloon envelops according to the present invention.

The envelop material according to Fig. 1,

consists-pf an outside layer of fabric a,

which is reinforced by strong threads 6 in the weft and warp weaved into or on to the fabric; on this fabric a thin layer of paper 0 is attached with 'chromeglue or the like, this layer being provided with a thin coating (Z of indiarubber, and on this finally is arranged a layer of felt or flannel e.

When very great demands in respect to the hereinbefore cited properties are- .re-' quired from the material, the combination illustrated in Fig. 2 is advisable. This con sists of a reinforced fabric a on the outside, if desired in combination with a smooth fabric a a layer of paper 0' attached to the fabric with chrome glue, a layer of indiarubber (l, a layer of fabric a with a second layer of indiarubber d and as inmost layer one of felted wool or other thin flannel like fabric 6'.

Having now described my invention what I claim as new and desire to secure by Let- 'ters Patent is 1. Balloon envelop material consistin of a fabric one smooth side and reinforced by strong threads spaced at intervals in the weft and Warp and woven with the material and projecting from the other side.

2. Balloon envelop material consisting of a .layer of fabric reinforced by strong threads spaced at intervals in the weft and warp, and a layer of smooth fabric joined to said first named layer.

3. Balloon envelop material consisting of a plurality of united layers of fabric each reinforced by strong threads spaced at intervals in the weft and warp and projecting from'one side only of the fabric.

4. Balloon envelop material consisting of fabric reinforced by strong threads spaced at intervals in the weft and warp, and a layer of fibrous gastight material united with said first named layer.

5. Balloon envelop material consisting of smooth fabric and layer of paper attached .thereto by an adhesive for gastightness.-

6. Balloon envelop material consisting of fabric reinforced by strong threads in the weft and warp and a .layer of paper adhered thereto for gastightnes's.

- 7. *Balloon envelop material consisting of fabric reinforced by strong threads in the weft and warp,'a layer of indiarubber and united therewith, and a layer of light proof material for preventing decomposition of the indiarubber and united therewith.

8. Balloon envelop material of fabric reinforced by strong threads in the weft and warp, a layer of indiarubber united therewith, a layer of light'proof material for preventing decomposition of the indiarubber united therewith, and a layer of nonconducting material as protection against temperature variations. I

9. Balloon envelop material of fabric reinforced by strong threads in the weft and warp, a layerof fibrous gastight material, attached thereto, and a layer of non-conducting material as protection against temperature variations. J e

'10. Balloon envelop material of fabrics reinforced by strong threads the weft and warp, a gastight layer attached thereto of fibrous material, a layer of indiarubber,

and a layer of non-conducting inaterial.

11. Balloon envelop material of reinforced fabric, a layer of gastight fibrous material attached thereto, a layer of indiarubber, a layer of smooth fabric, and a layer of indiarubber attached to the latter.

forced fabric, a layer of gastight fibrous material attached thereto, a layer of indiarubber, a layer of reinforced fabric and a layer of indiarubber attached to the latter.

13. Balloon envelop material of rein-. forced fabric, a thin gastight layer of paper attached thereto by. suitable adhesive, a coating of indiarubber on the latter layer,

and a non-conducting layer ofthin flannel 14:. Balloon env'elo material of rein} forced fabric, a gastight fibrous layer attached thereto having a coating of indiarubber, a layer of reinforced fabric also having a coating of indiarubber, and an inmost layer of non-conducting material. 15. Balloon envelop material of smooth fabric, a gastight "fibrous layer attached thereto having a coatingjof indiarubber, a layer of reinforced fabric also having a coating of indiarubber, and. an. inmost layer of non-conductingmaterial In testimony whereof I have .;signed my name to this specification in the presence of two subscribing witnesses.

- JULIUS RUND. Witnesses:

WALTER S'rmm, JEAN GRUND. 

